I think that SEN is good on:
Split (Were not shooting back and got hard anti-d by G2, def needs some work but has been really solid for them)
Haven (G2 banned it for a reason, SEN have looked really good since switching off that Iso comp)
Icebox?(A bit early to tell, but I loved the comp that they pulled out. Zekken needs more practice with the Omen, but I think that with more time this map can get even better for them)
Pearl (I've always felt kind of iffy on this one, but its been a solid map for them all year)
Ascent (Attack side is questionable, but its ascent so that's allowable to an extent. Defense looks incredible and they have great ideas against both yoru and waylay)
I am worried for:
Lotus (I hope that there is some cooking going on here, but the lotus has looked awful compared to last year, and they seem to be missing something there)
Fracture (I hate this map and so has SEN so far, as it's their perma)